Daily Punch 9-14-16 Bend the Blade ki feature for DnD 5e

How about one in the same vain as Crack the Shell for but weapons?

Bend the Blade

You can spend 1 ki point after you make an strike that hits to attempt to break a foes weapons, hands, or claws. The attacked creature must make a Strength saving throw or take a -2 penalty to one of its weapons. A creature may only be under one of this effect at a time. The creature can have its weapon repaired normally, through the use of a mendingspell, or in the case of natural weapon have a healing spell cast upon it. A foe can pick up an identical copy of this weapon and be free of this penalty as well.